WW2 alone can probably account for the loss of perhaps a quarter of the available global copper reserve now at the bottom of the oceans from conflict sunk shipping, and then dumping most of the electronic war surplus into the oceans after the war as there was too much of it to store, or too little collective wisdom to store it. It likely won't be available for use again until our planet and solar system are recycled in a future supernova.

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"There are more worlds than the one you can hold in your hand." Albert Hosteen, Navajo spiritual elder and code-breaker, X-Files TV Series.

Let's not even mention who is trying to suppress THAT sort of thing...

I'll mention it- the laws of thermodynamics. "Water fuels" are an old, old scam. The fundamental problem is that the O-H bonds in water are very, very stable. There is a high barrier to breaking them which is not even close to made up for when one forms H-H and O-O bonds. Even miracle non-existent catalysis won't help you here.

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"Pity, wrath, heroism, filled them, but the power of putting two and two together was annihilated."- EM Forster